Rim night-latch.



C. P. WICKS.

RlM NIGHT LATCH.

APPLICATION FILED APR.22. ms.

Patented Sept. 26, 1916.

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CLIFFORD 1?. WICKS, F STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE & TOWNE MANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

RIM NIGHT-LATCH.

Specification of Letters Patent.

Application filed April 22, 1916. Serial No. 92,904.

To all whom it may concern:

Be it known that I, CLIFFORD P. WIOKs, a citizen of the United States, and a resident of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Rim Night- Latches; and I do hereby declare the fol lowing to be a full, clear, and exact descrip tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improvement in night latches, and particularly to that type of latches having a double throw of bolt, which when the door is open projects approximately the same distance as a single throw of bolt, that is to say, a proper distance so that the bevel on the bolt will, when the door is closed, impinge upon the strike I on the amb, so that the closing of the door will push back the latch bolt, which will then shoot into the opening in the strike.

But in this latch there is the added feature matically produced. To accomplish this object means are provided for holding the bolt in its single throw position when the.

door is open, which means are released to permit the full throw of the bolt by the inward movement of the bolt during the closing of the door.

A further object is to obtain a bolt having a long throw with a normal easy acting bevel. r

A further object is to provide improved means for deadlockingthe bolt in its double throw or fully projected position.

With these ends in view my invention consists in the parts and combinations of parts and in the details of construction as will be more fully set forth and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in plan, the cover plate being removed, showing the bolt in its normal or single throw position; Fig. 2 is a similar view showing the bolt in its double throw or fully projected position; Fig. 3 is a view in long tudinal section of the case, the bolt mechanism being in elevation; Fig. 4 is a v ew of the deadlocking lever; Fig. 5 is a view of the cross head with which the rear end of the deadlocking lever coacts; Fig. 6 is an enlarged View showing the rear end of the deadlocking lever and cross head in their relative positions when the bolt is in its single throw position and Fig. 7 is a view showlng the same parts in their relative posltlons when the bolt is in its double throw position.

8 represents the latch case and 9 is the bolt mounted in the front of the case and provided with two rearwardly projecting tail pieces 10 which pass through the partition 11 extending crosswise of the case. This bolt is forced outwardly by the springs 12 encircling the tail pieces 10 and bearing at their ends against the partition 11 and rear end of the bolt and each is provided at 1ts extreme rear end with the rigid cross head 13.

Located at the outer sides of the tail pieces and parallel with the same, are the guide pins 1% each of .which passes through the partition 11 and through the sleeve 11 secured to said partition and is provided at its rear end with a fixed cross head 15, each cross head having an opening through the same for the passage of the adjacent tail piece 10. The guide pieces are encircled by springs which bear against the heads of the pins and the partition 11 and yieldingly hold said pins in their forward positions.

16 are the cams, one of which is actuated by the inside knob and the other by a key in the usual and well known manner.

Pivoted at 20 to the lock case 8 is the releasing lever 17 provided with an extension 18 which rests normally'in the notches 19 of the cams 16, so that when either of said cams is turned by the action of the knob or key mechanism, this extension will be moved forwardly and carry with it the lever 17 The free end of lever 17 rests adjacent to the arm 21 of the dead locking lever 22, so that when the lever 17 is turned on its pivot it will engage arm 21 of dead locking lever 22 and move same in a direction to carry the front end of lever 22 away from and out of the path of movement of the bolt 9.

The deadlocking lever 22 is pivoted at 23 to the look case and is of a length sufficient Patented Sept. 26, 1916.

for its front end to engage the rear face of the bolt 9 when the latter is fully projected and deadlock the same, and its rear end 27 to engage a projection 24 on the adjacent cross head 13 and hold the bolt in its first throw or normal position as in Fig. 1.

The bolt mechanism is reversible, hence each cross head 13 is provided with a stop 24, so that one stop will be in a position to cooperate with the deadlocking lever, irrespective of the position of the bolt mechanism in the lock case.

The stop projects outwardly from the cross head and also projects forwardly as at 25 and rearwardly as at 26, the rearwardly projecting portion having an inclined face so adapted that after the front end of the lever 22 has been carried out of the path of the bolt head 9 by means of the auxiliary lever 17 coacting with cam 16, said inclined surface will then be in position to still further depress the projection 27 in order to allow it to pass under the stop 26 and then spring up on the forward side of the same under tension of spring 28, thus holding the bolt in the normal position shown in Fig. 1. The upward travel of lug 27 is limited by the stop 25, thus holding the deadlocking lever 22 out of its deadlocking position, while the latch bolt is in its normal position.

In view of the double throw feature of the bolt the tail of the bolt is obliged to travel twice as far as it would ordinarily and in order to provide for the automatic projection of this bolt, and still have the cam which operated the bolt by means of the key or the knob always in operative condition, it is necessary to provide supplementary cross-heads 15, which crossheads are operated with independent auxiliary springs 12*, which latter always tend to draw the crosshead 15 into contact with the cam 16. It will be seen by reference to Fig. 2 that when the bolt is in its fully projected position, the cross-heads 13 are in contact with the cross-heads 15, but when the bolt is only half projected, as in Fig. 1, then when the cam is turned either by the key or the bolt, it will first impinge on the cross-head 15, which will be forced backward against the cross-head 13, and then will begin to operate to retract the bolt.

In the operation of the latch the bolt is forced inwardly by its contact with the strike plate. This rearward movement of the bolt carries the cross heads 13 rearwardly until the forwardly projecting portion 25 of stop 24 passes beyond and releases the rear end of the deadlocking lever 22 thus permitting the spring 28 to throw the rear end of said deadlocking lever outwardly, and its front end inwardly into contact with the bolt head. As the bolt shoots outwardly its full or double throw,

locking lever, and turn the latter in a direction to carry its forward end up out of the path of the bolt 9, thus permitting the latter to be retracted, and its rear end inwardly until its lug is in the path of movement of the inclined face of the rearwardly extending portion 26 of the stop 24.

When the bolt is fully projected or in its double throw position, the cross heads 13 rest in contact with the cross heads 15 on the guide rods 14. These latter cross heads are engaged by the cams 16, which as before explained are actuated by the knob and key mechanism respectively, hence when either cam is turned it forces the cross heads 15 rearwardly and the latter being in contact With the cross heads 13 carry the latter and the bolt rearward-1y. By this action of the cam 16, before the bolt is withdrawn sufiiciently to contact with the deadlocking lever 22, the said lever is first raised out of its deadlocking position through the action of the cam on the lever 17 and arm 21, thus holding the lug 27 in the line of travel of the inclined face 26 on the crosshead 13. Then by the continued action of cam 16, the lug 27 is forced down by the inclined face 26 so that said lug passes under the stop 24 and then springs up in front of the cross head to hold the bolt in its normal throw as previously explained. After the bolt has been fully retracted to clear the strike plate or keeper, and the door opened, the key or knob is released, thus permitting the springs 1.2 to project the bolt and springs 12 to return the cam 16 to normal position. In the meantime, as the cams 16 resume their normal position the extension 18 enters the recesses 19 in said cams, and permits the lever 17 to resume its normal position thus leaving the deadlocking lever free to turn as soon as it is released from the forward proj ection 25 of the stop 24. This release of the deadlocking lever is accomplished by the inward movement of the bolt, so that when the bolt is pushed inwardly from its first throw or normal position, it will be projected its full or double throw position, and when in this latter position can only be retracted by the inside knob or key mechanism of the latch.

It is evident that many slight changes might be resorted to in the relative arrangement of parts shown and described without departing from the spirit and scope of my invention. Hence I would have it understood that I do not wish to confine myself to the exact construction and arrangement of parts shown and described but,

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is

1. In a latch, the combination of a spring actuated bolt, retracting mechanism for the same, and a lever operated by the bolt retracting mechanism and adapted when in one position to hold the bolt retracted and when in its other position to deadlock the bolt.

2. In a latch, the combination of a spring.

actuated bolt, means for holding the bolt partly projected and for deadlocln'ng it when it is fully projected, and means actu ated by the rearward movement of the bolt for shifting said holding and deadlocking means from its holding to its deadlocking position.

3. In a latch, the combination of a spring actuated bolt, means for holding the bolt partly projected and for deadlocking it when fully projected, means actuated by the rearward movement of the bolt for shifting said holding and deadlocking means from its holding to its deadlocking position and knob or key mechanism for shifting said holding and deadlocking means from its deadlocking position into its holding position.

4. In a latch, the combination of a spring actuated bolt having a tail piece, a cross head secured to the tail piece and provided with a stop, a lever adapted'when in one position to engage said stop and hold the bolt partly projected, and when in its other position to deadlock the bolt in its fully projected position, and knob or key actuated mechanism for moving said lever from its deadlocking position.

5. In a latch, the combination of a spring actuated bolt having a tail piece, a cross head on said tail piece and provided with a stop, a lever actuated in one direction by a spring and adapted when in one position to engage the stop on the cross head and hold the bolt partly projected, and when in another position to engage the bolt and dead lock the same in its fully projected position and knob or key actuated means for moving said lever in opposition to its spring.

6. In a latch, the combination of a spring Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

actuated bolt having a tail piece, a cross head on the tail piece, a stop on said cross head, the said stop having a forwardly projecting part, and a pivoted lever, adapted when in one position to dead lock the bolt when the latter is fully projected and when in its other position to engage said stop and forward projection from the latter and hold the bolt in its partly projected position.

7. In a latch, the combination of a spring actuated bolthaving a tail piece, a cross head on the tail piece, a stop on said cross head, the said stop having forwardly and rearwardly projecting members the rearwardly projecting member having an inclined face, and a bolt holding lever, having a projecting lug adapted to engage the inclined face on rearwardly projecting member of the stop whereby the lever will be moved into its holding position during the forward movement of the bolt.

8. In a latch, the combination of a spring actuated bolt, retracting mechanism for the same, a lever operated by the bolt retracting mechanism and adapted when in one position to hold the bolt retracted and when in its other position to deadlock the bolt, and means actuated by the knob or key mechanism of the latch for shiftingsaid lever from its dead locking position so as to permit the bolt to be retracted.

9. In a double throw latch the combination of a spring actuated bolt having a tail piece and cross-head secured to the tailpiece, supplementary cross-head guided by the tail piece, and an auxiliary spring tending to bring said auxiliary cross-head into contact with the operating cam of the latch.

10. In a latch, the combination of a spring actuated bolt, a lever adapted when in one position to hold the bolt retracted and when in its other position to deadlock the bolt, and means actuated by an inward movement of the bolt to release said lever from its bolt holding position so as to permit the bolt to be projected.

In testimony whereof, I have signed this specification in the presence of two sub- WM. S. BALKHAM, REINHOLD SoHoELL.

Washington, D. G. 

